AL5812-3FF-7 Equivalent & Substitute Parts

Part Overview

The AL5812-3FF-7 is a linear LED driver IC manufactured by Diodes Incorporated, designed for single-output PWM dimming applications with a maximum output current of 150mA. This device operates across a wide supply voltage range of 4.6V to 60V and is commonly used in signage applications. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

AL5812-3FF-7

Diodes IncorporatedIn Stock: 25237AL5812-3FF-7 Datasheet

Current PartRFQ

AL5812FF-7

Diodes IncorporatedIn Stock: 5987AL5812FF-7 Datasheet

Parametric EquivalentRFQ

A6260KLJTR-T

Allegro MicroSystemsIn Stock: 45572A6260KLJTR-T Datasheet

MFR RecommendedRFQ

MAX16835ATE+

Analog Devices Inc./Maxim IntegratedIn Stock: 879MAX16835ATE+ Datasheet

MFR RecommendedRFQ

MAX16839ASA+

Analog Devices Inc./Maxim IntegratedIn Stock: 3473MAX16839ASA+ Datasheet

MFR RecommendedRFQ

NCR401UX

Nexperia USA Inc.In Stock: 17026NCR401UX Datasheet

MFR RecommendedRFQ

STCS2SPR

STMicroelectronicsIn Stock: 5963STCS2SPR Datasheet

MFR RecommendedRFQ

TLD1125ELXUMA1

Infineon TechnologiesIn Stock: 6026TLD1125ELXUMA1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AL5812-3FF-7 is determined by the following critical parameters:

• Topology: Linear LED driver architecture
• Dimming Method: PWM (Pulse Width Modulation)
• Number of Outputs: Single output configuration
• Internal Switch: Integrated switching element required
• Output Current Capability: Minimum 150mA to maintain functional equivalence
• Supply Voltage Range: Must support the application's voltage requirements
• Operating Temperature: -40°C to 125°C minimum
• Mounting Type: Surface mount packages only
• Package Compatibility: Physical footprint considerations for PCB integration

Substitute parts are grouped into two categories:

1. Parametric Equivalent: AL5812FF-7 — identical electrical specifications with different packaging (Tape & Reel vs. Tube)
2. Functional Alternatives: Parts with higher current ratings (350mA, 360mA, 2A) or modified voltage ranges that can accommodate the AL5812-3FF-7 application space with design considerations

Parameter Comparison

Engineering Selection Recommendations

Direct Parametric Equivalent: AL5812FF-7 is the recommended first choice for direct replacement. It maintains identical electrical specifications (4.6V to 60V supply, 150mA output, PWM dimming) and package footprint (6-UDFN Exposed Pad) as the AL5812-3FF-7. The only difference is packaging format (Tape & Reel vs. Tube). Product status is Active with ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Functional Alternatives for Higher Current Applications: If the application requires higher output current capability, the following parts provide increased current ratings while maintaining linear PWM dimming architecture:

• A6260KLJTR-T (Allegro MicroSystems): 350mA output, 6V to 40V supply, 8-SOIC package. Includes automotive qualification (AEC-Q100).
• MAX16835ATE+ (Analog Devices/Maxim): 350mA output, 6.5V to 40V supply, 16-TQFN package. Automotive grade with AEC-Q100 qualification.
• TLD1125ELXUMA1 (Infineon Technologies): 360mA output, 5.5V to 40V supply, 14-LSSOP package. LITIX™ series with automotive qualification.
• STCS2SPR (STMicroelectronics): 2A output, 4.5V to 40V supply, PowerSO-10 package. Highest current capability for demanding applications.

Lower Current Alternative: MAX16839ASA+ (Analog Devices/Maxim) provides 100mA output with 5V to 40V supply in 8-SOIC package. Suitable only if application current requirements are reduced. Includes automotive qualification.

Minimal Current Application: NCR401UX (Nexperia USA Inc.) offers 10mA output in 6-TSOP package. Applicable only for low-power signage or indicator applications. Includes automotive qualification (AEC-Q101) and extended temperature range (-55°C to 150°C).

All substitute parts maintain linear topology, single-output configuration, internal switching capability, and surface-mount construction. All active alternatives carry ROHS3 compliance and REACH Unaffected status, matching the regulatory profile of the obsolete AL5812-3FF-7.

Frequently Asked Questions (FAQ)

Q: Can AL5812FF-7 be used as a direct drop-in replacement for AL5812-3FF-7? A: Yes. AL5812FF-7 is a parametric equivalent with identical electrical specifications and package footprint. The difference is packaging format (Tape & Reel vs. Tube), which does not affect circuit performance or PCB assembly compatibility.

Q: What is the primary reason to consider substitute parts beyond AL5812FF-7? A: The AL5812-3FF-7 has a maximum output current of 150mA. If your application requires higher current delivery, substitute parts with 350mA, 360mA, or 2A ratings provide increased capability. Conversely, if current requirements are lower, alternatives with reduced ratings may offer cost or size advantages.

Q: Are the higher-current alternatives (A6260KLJTR-T, MAX16835ATE+, TLD1125ELXUMA1, STCS2SPR) pin-compatible with AL5812-3FF-7? A: No. These parts use different package types (8-SOIC, 16-TQFN, 14-LSSOP, PowerSO-10) compared to the 6-UDFN of the original. PCB redesign is required for package migration. Pin configuration and function mapping must be verified against individual datasheets.

Q: Do all substitute parts support the full 4.6V to 60V supply range of the AL5812-3FF-7? A: No. Most alternatives have reduced maximum supply voltage (40V) compared to the original (60V). AL5812FF-7 maintains the full 4.6V to 60V range. If your application requires operation above 40V, AL5812FF-7 is the only suitable option among the listed substitutes.

Q: Which substitute parts carry automotive qualification? A: A6260KLJTR-T, MAX16835ATE+, MAX16839ASA+, NCR401UX, and TLD1125ELXUMA1 include automotive-grade qualification (AEC-Q100 or AEC-Q101). These are suitable for automotive lighting and signage applications requiring automotive-level reliability.

Q: What is the difference between PWM dimming and other dimming methods in these parts? A: PWM (Pulse Width Modulation) dimming controls LED brightness by varying the duty cycle of the output signal while maintaining constant frequency. All listed substitutes except NCR401UX explicitly support PWM dimming, matching the AL5812-3FF-7 functionality. NCR401UX does not specify a dimming method.

Q: Are there inventory considerations when selecting a substitute? A: Yes. AL5812FF-7 has 5,962 units in stock. Higher-current alternatives have varying availability: A6260KLJTR-T (45,522 units), TLD1125ELXUMA1 (5,918 units), STCS2SPR (5,924 units), MAX16839ASA+ (3,424 units), and MAX16835ATE+ (859 units). Inventory levels may influence lead time and cost for production quantities.

Q: Can NCR401UX be used as a substitute despite its 10mA output rating? A: NCR401UX is suitable only for applications with significantly reduced current requirements (10mA vs. 150mA). It is not a functional substitute for standard AL5812-3FF-7 applications. Use only if your design has been modified to operate at 10mA output current.